This paper examines how immigrant enclaves influence labor market outcomes. We examine the effect of variation in ethnic concentration across counties and county subdivisions on both immigrant earnings and employment using the non‐public use, 1‐in‐6 sample of the 2000 U.S. Census. We find that there is heterogeneity in enclave impacts by ethnic group and skill composition of the enclave. While some groups tend to suffer from lower wages and employment propensities when residing in areas with larger ethnic concentrations, others have higher wages and improved employment opportunities in enclaves. (JEL J61, J15, R23)